Model Boat Mayhem

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Author Topic: What are these?  (Read 479 times)

MvModeller

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What are these?
« on: March 08, 2024, 12:40:02 pm »

Hello


I have come acrossed something while researching my ship,
I shall post a link so you can hopefully view it.


On the rudder of this ship, there are white "things" jotted over the rudder and ships hull? Any ideas what these are?


https://www.marineinsight.com/wp-content/uploads/2014/12/rudder.jpg

Any info would be great.. Id like to add some detail to my rudder so just looking to see if this could be a feature?




Mv
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Circlip

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Re: What are these?
« Reply #1 on: March 08, 2024, 12:46:25 pm »

Sacrificial anodes, they rot due to electrolysis rather than the hull.   %%


  Regards  Ian.
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MvModeller

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Re: What are these?
« Reply #2 on: March 08, 2024, 01:41:30 pm »

Ah ha.. thank you.. :-))
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Geoff

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Re: What are these?
« Reply #3 on: March 12, 2024, 10:08:22 am »

To add, the ship probably has a phosphor bronze prop and in salt water (indeed even in fresh water to a lesser extent) this would all react with the metal of the hull so the sacrificial anodes are added to corrode first and protect the ship. Harbours also have a lot of free electrical leaks into the water (true) which accelerates the process. Basically the different metals act like a battery with the salt water being the medium.


Whilst a fibreglass hull, my friends yacht has a couple of these to protect the propeller, shaft, bearings and hull fittings.


Cheers


Geoff
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